I discovered this little oddity the other day while driving along a gravel road in Giles County, Virginia. I have no idea how the spring got there; it was in a patch of underbrush next to the road. There was no house or other building in the immediate vicinity.
I found it on East River Mountain Road, a few miles from the town of Glen Lyn. The road starts on US Route 460 between the Exxon station and the power plant. It winds around on the side of a mountain before dropping back down to Lurich Road next to a one-lane railroad underpass.